/*!
  Copyright (c) 2018 Jed Watson.
  Licensed under the MIT License (MIT), see
  http://jedwatson.github.io/classnames
*/
/* global define */

(function() {
    'use strict';

    var hasOwn = {}.hasOwnProperty;

    function classNames() {
        var classes = [];

        for (var i = 0; i < arguments.length; i++) {
            var arg = arguments[i];
            if (!arg) continue;

            var argType = typeof arg;

            if (argType === 'string' || argType === 'number') {
                classes.push(arg);
            } else if (Array.isArray(arg) && arg.length) {
                var inner = classNames.apply(null, arg);
                if (inner) {
                    classes.push(inner);
                }
            } else if (argType === 'object') {
                for (var key in arg) {
                    if (hasOwn.call(arg, key) && arg[key]) {
                        classes.push(key);
                    }
                }
            }
        }

        return classes.join(' ');
    }

    if (typeof module !== 'undefined' && module.exports) {
        classNames.default = classNames;
        module.exports = classNames;
    } else if (typeof define === 'function' && typeof define.amd === 'object' && define.amd) {
        // register as 'classnames', consistent with npm package name
        define('classnames', [], function() {
            return classNames;
        });
    } else {
        window.classNames = classNames;
    }
}());